Sheave-block for hoisting and conveying machines



(No Model.)

A. E. BROWN.

SHEAVB BLOCK FOR HOISTING AND CONVEYING MACHINES.

No. 390,341. Patented Oct. 2, 1888.

Ina en in 2-, fizax Efirowru N PEYEHa F'nelcillhugnphcr, Washington, D.C.

UNITED STATES ALEXANDER E. B ()\VN, OF CLEVELAND, ()IIIO.

SHEAVE-BLOCK FOR HOISTING AND CONVEYING MACHINES;

SPECIFICATION fonning part of Letters Application filed March In, 1857.

To all whom it may concern.-

Be it known that I, ALEXANDER It. BROWN. of Cleveland, in the county ofCuyahoga and State of Ohio, have invented anew and useful Improvement insheave-Blocks for Hoisting and Conveying and other Machines; and I dohereby declare that the following is a full, clear, and exactdescription'thercof, reference beinghad to the accompanyingdrawings,making part of this application.

Myinvention relates more especially to that kind of hoisting andconveying machines in which the sheave-block (from which the load issuspended) has its sheave or pulley rotated while the block is beingconveyed by the trolley or carriage. In such machines the constructionof the sheave-bl0ck has heretofore been such that thelaterally-projecting ends of the sheave-axle have come into directcontact with the block-sustaining hooks or supporting devices of thetrolley, and in such machines of course more or less friction betweenand Wear of both the hooks and the ends of the sheave axle have resultedfrom the turning of the axle ends in the sustaining hooks or devicesofthe carriage. I propose by my invention to entirely remedy this defector objectionable fcature of machines made as heretofore, and at the sametime otherwise improve the construction of machines of the speciesreferred to; and to these main ends and object my invention may be saidto consist, primarily, in forming or providing the plates orcheek-pieces of the sheave-block with exteriorly-projecting hubs, whichnot only contain bearing-boxes for the ends of the sheaveaxle whichdirectly and wholly surround said sheave-axle ends, but also serve asthe devices to engage with the block-supporting hooks of the carriage ortrolley in lieu of the end of the sheave-axle, as heretofore, all aswill be hereinafter more fully described; and my invention consists,secondarily, in a novel structure of the hub-like projcctions of thesheave-block with oil-receptacles, all as will be hereinafter more fullyexplained.

To enable those skilled in the art to which my invention relates to makeand use pulleyblocks containing the same, I will now proceed to morefully describe my improvements,

Patent No. 390,341, dated October 2, 18E8 Serial No. 233,121. (Nomodel.)

referring by letters to the accompanying drawings, which form a part ofthis specification, and in which Ihave shown my invention carried out inthat form which is best now known to me, and in which I havcso farsuccessfully practiced it.

In the drawings, Figure l is a perspective view of a sheave device orpulley-block enibracing my invention and of a form such as I havesuccessfully used in hoisting and conveying machines for handling coal,ores, &c. Fig. 2 is a partial axial section of the sheave device, drawnon a larger scale for the purpose of exhibiting more clearly thedetailed construction of the journal-boxes and the arrangement of theaxle of the wheel. Fig. 3 is a partial axial section on the same scaleas Fig. 2, but drawn in a plane such as to show the feed or supply holefor oiling the journal in communication with the ingress-hole of theplug of the hub like device, and in all the figures the same parts willbe found designated by the same letters of reference.

A are the cheek-pieces of the block, which in the case shown are made ofmetal.

B are tubular hnblike devices, which are securely fastened at theirroots to the outer open outer ends are threaded interiorly for a shortdistance inwardly, for a purpose to be presently explained.

F is a sheave or wheel of any of the usual forms, and this wheel is madefast on the axle or spindle E, which projects at either side of thewheel to a suitable extent to form journals of sufficient length to bedurable. These projecting ends or journals of the axle Eare fitted torun within brass boxes or bushings d, that are fitted tightly within thehub-like projcc" tions B. These hub-like projections are, however,considcrably longer than the bushings d and the journals which worktherein, so as to leave quite a space or receptacle, as shown at J,between the end of the axle E and the open end of the said hnblikeprojections, which receptacle isdesigned and used for the purposes of anoil-box or oil-reservoir.

The outer end of the tubular device or hub B is closed up by ascrew-plug, g, the thread on the periphery of which engages with thefaces of the cheek-pieces A, and which at their female thread formedinteriorly at the outer end of the hub, and said screw-plug, which ismade, as shown, diskshaped, has a small hole, in its peripheral orflange-like portion, which, when turned to coincide with the hole It(drilled near the end of the hub B) will form a free communication withthe oil-reservoir J for the purpose of supplying the same through saidhole h, as occasion may require. Of course when the plug is turned intothe position shown at Fig. 2, the hole It will be closed by the plug toprevent any escape of the contents of the receptacle J.

For the purpose of supporting or holding in place with sufficientrigidity the projecting hub-like devices B, I surround each of saiddevices with a convex or segmentally-shaped washer-like device,(which,preferably, is made hollow,) as seen at c. This device being securelyriveted or otherwise fastened to the cheek-piece A of the contrivance,(and if deemed expedient also secured to the hub B, or it may form apart of it in one piece, as in Fig. 3,) serves effectually to strengthenthe organization and lend rigidity to the hubs, within which areformed,as already explained, the bearing-boxes for the journals of the shaft E.

It will be seen that in a pulley-block constructed as shown anddescribed not only are there presented for cooperative action with thesupporting hook-like devices of the trolley axially-located stationaryprojections, so that there is no friction caused by any rotatorymovement within the load-supporting hooks of the laterally-projectingdevices of the sheaveblock, but, furthermore, by reason-of theelongation of the hubs of the cheek-pieces of the block, so as toconstitute the devices to engage with the trolley-hooks, much longerjournalboxes are afforded (and consequently longer and moredurablejonrnals can be formed on) the sheaveraxle, which is a greatdesideratum.

By the extension of the hub-like device B, so as to form theoil-receptacles J, I am enabled to provide for a perfect and continuouslubrication of the working or bearing surface, and thus add greatly tothe durability of the block as compared with one in which the wheelturns upon the fixed stud, and in which it is therefore quiteimpracticable to keep the hearing or working-surfaces always thoroughlylubricated. The simple device of the screw-plug g, with its hole t andthe oil-hole h in the endof the hub, serves efficiently and convenientlythe purpose already explained,

and adds to the perfection of the contrivance as a whole.

Of course, the primary or main feature of my invention may be employedin the construction of pulley-blocks under a variety of modifications ofform, and either with or without the secondary or supplemental featuresof the oil-reservoir, &c. In practicing my invention so far I have,however, found it expedient and desirable to construct the entire devicesubstantially as I have herein shown and described it.

As it is not indispensable to my invention that all the describedfeatures be used together, or that as to any one of said features allthe parts be made in precisely the forms shown, I wish it to beunderstood that what I claim as new,irrespective of any precise forms ofparts and whether used together or separately, and desire to secure byLetters Patent, is-

1. In a sheave-block adapted for use in conneetion with theload-supporting books of the trolley of a hoisting and conveyingmachine, the combination, with the hub-like axially located lateralprojections which operate as stationary supporting devices forengagement with the hooks of the trolley, of bearings for the inelosedsheave-journals, which completely surround said journals, allsubstantially as hereinbefore set forth.

2. In a sheave block having its sheave mounted fast on its axle, andhaving the ends of the axle supported by completely-surrounding bearingslocated within the hub-like projections of the cheekpieces, the closedtubular extensions of the said hub-like devices beyond the ends of theaxles, which tubular extensions operate as oil-reeeptacles, the wholeconstructed and operating as hcreinbefore set forth.

3. In a sheavebloek having journalboxes formed or arranged within thehub-like extensions B, oil-receptacles with oil-holes h located near theends thereof, and screw-plugs 9, pro vided withperipherally-arrangedholesi, which may be thrown into and out ofregister with the oil-holes h, the said devices being all combined andoperating together in substantially the manner and for the purposeshereinbefore set forth. I

In witness whereof I have hereunto set my hand this 31st day of August,1886.

ALEX. E. BROWN.

In presence of- E. T. SOOVILL, O. B. KRAUSE.

